On Fri, May 18, 2018 at 11:48 PM, Milan Zamazal <mzamazal@redhat.com> wrote:

Hi, I have been playing with using Lago snapshots to restart oVirt
system tests from a certain point without all the preceding
initialization and tests. The primary purpose is to save time when
running a suite over different data center compatibility versions but it
could be also useful e.g. when writing and debugging tests.

However since `lagocli snapshot' makes disk-only snapshots the VMs get
restarted when they are reverted. This may cause various problems. For
instance, when I snapshot/revert before running add_dc test then
verify_notifier test fails -- I assume due to the event being initiated
before the snapshot and completed after the snapshot, so it's missing in
after-revert runs. Snapshots with memory should resolve similar issues.
Is it possible to make such snapshots in Lago?

It's not entirely clear to me that this will work well for all flows.

For example, I don't anticipate network connections (storage, storage, storage...) to persist well.

This will make the whole exercise pointless, regretfully. (or in other words: this is when I gave up on the same idea).

I'd also like to clarify how is `lagocli revert' supposed to be used.
It seems to basically work as such but I could experience network
accessibility problems of the reverted Lago VMs. lagocli stop + revert
+ start seems to be a safer way of reverting to a snapshot. How should
`lagocli revert' be used properly?

Thanks,
Milan
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